Broan-NuTone IMA110WH2 Wireless Intercom, White. Twin Pack.Broan-NuTone IMA110WH2 Wireless Intercom, White. Twin Pack. Features:; This 4-channel FM intercom can use up to 8 stations. ; The voice-activated 'Auto' key provides total 'Hands-Free' operation, or choose the monitor function. ; Features an advanced circuit to receive the clearest reception with no drifting. Built-in circuitry reduces interference from fluorescent lights, appliances or dimmers. ; The rotary volume control with 'Off' setting allows you to adjust each station. ; You can use it wherever there's an AC outlet. Provides 500 ft. range. ; And the unit's compat size (7"W x 5-3/4"D x 1-7/8"H) makes it fit just about anywhere. ; Unit is compatible with NuTone model IM-110. ; RF frquencies are 200 KHz, 230 KHz, 260 KHz and 290 KHz.; "Just Plug It In" Intercom System - Twin Pack